The country with the biggest weed habit? That might surprise you.

A new report claims the UK government should legalise marijuana because it's “the only solution to crime and addiction problems”.

The strongly-worded study - titled The Tide Effect: How the World is Changing its Mind on Cannabis - was produced by the nonpartisan Adam Smith Institute and has the backing of several cross-party MPs including former deputy prime minister, Nick Clegg.

A new report claims the UK government should legalise marijuana because it's “the only solution to crime and addiction problems”.

The strongly-worded study - titled The Tide Effect: How the World is Changing its Mind on Cannabis - was produced by the nonpartisan Adam Smith Institute and has the backing of several cross-party MPs including former deputy prime minister, Nick Clegg.

Marijuana legalization has been a political issue in the United States for some time, and while it remains illegal in most states, others have softened their stance in recent years. Colorado and Washington both passed initiatives by popular vote to decriminalize and legalize cannabis in 2012. In 2014, Oregon, Alaska and Washington, D.C., followed suit. Many states including Massachusetts, California, Missouri, Hawaii, Maine, Nevada and Ohio have flirted with legalization for a few election cycles, with buzz growing.

The United States isn't the only country where people use marijuana legally or illicitly. In fact, it isn’t even the country with the highest reported marijuana use.